Question: Did Caffeine subject has role stimulant and PDE3 inhibitor ?
Paraphrase: Does Caffeine play a role as a stimulant and PDE3 inhibitor?
SPARQL (Wikidata): ASK WHERE { wd:Q60235 wdt:P2868 wd:Q211036 . wd:Q60235 wdt:P2868 wd:Q2043933 }